Here is my weekly weather quiz question. What is “coalescence?” Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

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The upper level airflow is sending cooler air our way and continuing our rain chances. A frontal system will move in Wednesday then part of it will bend back to the northeast and move over us again.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 28 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 12 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 15 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

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Advisories:

• A HIGH WIND WARNING IS IN EFFECT FROM 10 AM UNTIL 7 PM TUESDAY FOR THE NORTH OREGON COAST AND THE COAST RANGE OF NORTHWEST OREGON.
• A HIGH SURF ADVISORY IS IN EFFECT FROM NOON TUESDAY UNTIL MIDNIGHT TUESDAY NIGHT FOR THE NORTH OREGON COAST AND THE COAST RANGE OF NORTHWEST OREGON.
• A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY FOR HIGHER-THAN-NORMAL FECAL BACTERIA WHICH CAN RESULT IN DIARRHEA, STOMACH CRAMPS, SKIN RASHES, UPPER RESPIRATORY INFECTIONS AND OTHER ILLNESSES. DIRECT CONTACT WITH THE WATER – ESPECIALLY BY CHILDREN AND THE ELDERLY, WHO MAY BE VULNERABLE TO WATERBORNE BACTERIA – SHOULD BE AVOIDED IN THIS AREA UNTIL THE ADVISORY IS LIFTED. VISITORS SHOULD AVOID WADING IN NEARBY CREEKS, POOLS OF WATER ON THE BEACH, OR IN DISCOLORED WATER AND STAY CLEAR OF WATER RUNOFF FLOWING INTO THE OCEAN.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly cloudy with rain tonight (0.25 in. of rain possible)
• Rain Tuesday (0.50 in. of rain possible) and in the evening, showers Tuesday night (0.25 in. of rain possible),
• Cloudy and a bit cooler with a good (50%) chance of showers Wednesday, a good (50%) chance of evening rain, rain late at night and Thursday, then mostly cloudy with a good (50%) chance of rain at night.
• lows 48-43 warming to 45 Thursday night highs 59-53 warming to 56 Thursday.
• Mostly cloudy and cooler with a good (50%) chance of rain Friday, partly cloudy with a (40%) chance of showers Friday night,
• A mix of clouds and sun with a slight (20%) chance of showers and a bit cooler Saturday and Sunday, partly cloudy with a slight (20%) chance of showers Saturday night and Sunday night,
• Then a mix of clouds and sun with a (30%) chance of showers Monday.
• highs 53-46 lows 44-36. (seasonal averages high 52 low 38)

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Your Saturday College Football Forecast:

Ducks vs USC at Autzen Stadium – Kickoff 12:30 PM PST: A mix of clouds and sun with a slight chance of showers, 44 warming to 48 by the end of the game.

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Beavers vs Washington at Reser Stadium – Kickoff 3:00 PM PST: Partly cloudy with a slight chance of showers, 48 cooling as the game progresses.

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Forecast for Roseburg:

• Cloudy and cooler with rain tonight (0.15 in. of rain possible),
• Rain likely (70%) and a bit warmer Tuesday (0.10 in. of rain possible), rain Tuesday night (0.25 in. of rain possible),
• Mostly cloudy and a bit cooler with a (40%) chance of showers Wednesday, a good (50%) chance of evening rain, rain likely (60%) late at night,
• Mostly cloudy with AM rain likely (70%), rain Thursday afternoon, then a (40%) chance of rain Thursday night.
• lows 45-50 cooling to cooling back to 55 Thursday night highs 59-55.
• Mostly cloudy with a (40%) chance of rain and a bit cooler Friday, a (30%) chance of showers Friday night,
• Patchy AM fog, partly cloudy with a slight (20%) chance of showers in the afternoon, partly cloudy with a slight (20%) chance of showers at night both Saturday and Sunday,
• Then mostly cloudy with a (30%) chance of rain Monday.
• highs 55-50 lows 44-37. (seasonal averages high 53 low 40)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Mostly cloudy with rain this evening, rain likely (70%) late tonight and Tuesday, rain at night (0.25 in. of rain possible),
• Mostly cloudy and a bit cooler with a (30%) chance of showers Wednesday, a good (50%) chance of rain Wednesday night,
• Mostly cloudy with rain likely (70%) Thursday,  then a good (50%) chance of rain Thursday night.
• lows near 50 highs 59-57.
• Mostly cloudy with a (30%) chance of rain and a bit warmer Friday, a (30%) chance of showers Friday night,
• Patchy AM fog, partly cloudy and a bit cooler with a slight (20%) chance of showers Saturday and at night,
• Patchy AM fog, partly cloudy with a slight (20%) chance of showers Sunday and Sunday night,
• Then mostly cloudy and a bit cooler with a (30%) chance of rain Monday.
• highs 57-54 lows 48-43. (seasonal averages high 55 low 43).

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Forecast for the Cascades in Lane County:

• Cloudy with rain or snow this evening, rain late tonight (0.50 in. of rain possible, 2 in. of snow possible),
• Mostly cloudy and warmer with rain Tuesday (0.50 in. of rain possible) and  Tuesday night (0.50 in. of rain possible) and windy (Wind: SW 20-30 mph gusts to 50 mph),
• Mostly cloudy with AM showers likely (70%), a bit cooler with a good (50%) chance of showers Wednesday afternoon, cloudy with a good (50%) chance of evening rain or snow, rain or snow late at night,
• Mostly cloudy with rain and a bit warmer Thursday, then a good (50%) chance of rain Thursday night.
• snow level 4,500 ft. rising to 7,000 ft. late tonight and Tuesday, 6,000 ft.  Tuesday night, 4,500 ft. Wednesday, 6,000 ft. Wednesday night, then 7,000 ft. Thursday and Thursday night.
• lows 33-30 warming back to 33 Thursday night highs 42-35 warming back to 42 Thursday.
• Mostly cloudy with a good (50%) chance of rain Friday, partly cloudy with a (40%) chance of showers Friday night,
• Then a mix of clouds and sun with a (30%) chance of showers Saturday (warmer) and Sunday (cooler), partly cloudy with a slight (20%) chance of showers Saturday night and Sunday night,
• Then a mix of clouds and sun and cooler with a (30%) chance of showers Monday.
• snow level 6,500 ft. Thursday and Thursday night, 6,000 ft. Friday and Friday night, 5,000 ft. Saturday, 6,000 ft. Saturday night, 7,000 ft. Sunday, 6,000 ft. Sunday night, then 5,500 ft. Monday.
• highs 43-45 cooling to 39 Monday lows 32-28.

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**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

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Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

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